QGIS » QGIS Application

Sorry - I need to be more precise.

The issue happens if one adds a Postgis layer without permissions to change the layer.

In this case the fields can only be added as virtual fields (through the field calculator), but due to the missing permissions, one cannot remove the virtual fields anymore.

While the restriction for not being able to remove should apply to physical fields in this case, virtual fields should still be removeable.

Can you reproduce my issue in the case where you lack permissions to edit the PostgreSQL layer?

Thanks,
Andreas

Here are the exact steps:

1) Select a PostGIS table, adding it as a layer (make sure you have only select permissions on this layer)
 2) Go to LayerProperties->SourceFields
 3) Click on "Field Calculator" icon
 4) Define a new virtual field with formula: 3*2
 5) Press ok in the field calculator
 6) Select the new virtual field in the "Source fields" table
 7) The "delete field" button is greyed out (inactive)

While this behaviour is correct for physical fields (after all, the user only has SELECT permissions), virtual fields should still be removeable.

So to solve this issue, if a virtual field is selected, the "Delete Field" button should not be greyed out and always active.

I confirm it is a regression because 2.18.14 works fine (Delete is NOT greyed out for virtual fields while it is for physical fields)

It looks like there's no update of button states on changing attribute selection. Code in 2.18 had a signal handler onAttributeSelectionChanged which is not present in master.